Fuse



Aug. 3o, 1932.

l. G. ROODER FUSE l Filed Dec. 19, 1931 i' matted Aeg, 3o,

mwna q. noonna, or naooxnnr, Nnw Yoan :man

application inea :lemme: 1a, 1931. serial No. 582,117.

The present invention' relates to a new and useful lmprovement in fuses, and more particularly 1t pertains to fuses for cutting out electric circuits when an overload has been 5 im sed thereon.

t is one of the Aprimary objects of the invention to provide an electric fuse which is simple in construction, economical of manufacture, and highly efficient in its operation.

It is a :further object of the invention to provide a fuse in which none of the parts or elements are consumed duringan operation of the fuse to break an electric circuit.

With the, above and other objects in view, reference will be had to-the accompanying drwing, wherein;

1 of a se constructed in accordance with the present invention, and l Figure 2, is a top plan view of the fuse.

Referring more particularly to the drawing, the fuse com rises a main body portion 5 which is formedp of porcelain or other suitable similar non-conducting material.

The body rtion 5 has a circular flange 6 which exten s therefrom to form a cup or the like 7. The cup '7 is provided with a lining 8 of conductng'matenal and said linin preferabl has a tight it within the cup e portion The lining 8 has a flange 9 which overhangs the open end ofthe flange 6 and extends slightly therebeyond as indicated at 10.

The reference numeral 11 designates ashell whii is provided with a screw thread and forms the means for attachment vof the parts in a cut-out. This shell has screw threaded engagement with the ange 9- of Ythe lining 8 as indicated at 13 in Figure 1 and this forms the means by which the shell is held in position upon the main body portion 5.. 1Intersed between the shell and the' flange 9, there 'is a flat disk like member 15 of non-conducting material and this' member is heldin position by means of an inwardly projecting flan e 16 on'the'shell- 11. v

e member carries a centra-l electrode e ...1 central electrode 20 is in the form of a conducting-bar or Bin havingaI head 21 nd itv'is pSSQd throug k an openmg 22i the is a conducting medium 18 which in the ent instance is mercury.

re 1, is a longitudinal sectional view l member 15. This electrode 20 projects to a point near the bottom of the cup like portion of the main body portion 5, its lower end belng s paced from the bottom of said cup like f porton and from the side walls of the lining In the bottom of the cup like member, there pres- Thus it will be apparent that the fuse has 60 two contacts, one of which is provided by means of the shell 11,- and the other being -provided by means of the head 2l of the electrode 20. Electric" current passing throu h either vof these conta-cts will pass through t e mercury 18 and the circuit will be thereby f completed between these two contacts.

Immediately the circuit is subjected to a heavy load, the mercury is dispersed and the circuit is broken thus preventing damage t0 70 the circuit or any devices which may be included therein.

After the fuse has operated in the manne heretofore described to break the circuit, it

lis only necessary to remove the fuse invert the same when the mercury will be collected andthe fuse is again ready for-use.

" Thus it will be apparent that the present invention provides a fuse in which the aforementioned operations are efficiently carried out. Y

While the invention has been herein illustrated in what may be termed a referred form, it is to be understood that the invention is notto belimited to the specific lconstruc- 85 tion herein shown, but that -it may be carried out in other forms without departing from the spirit thereof.

Havin i thus described the invention, what lis claime as new and what it is desired to se- 90 cure-by'Letters-Patent. of the United States,

1s: 1. A fuse comprising a cup sha ed member of non-conducting material, a tu ular membel` ofconducting material forming a lining for the cup-shaped member, a shell of conducting material embracing said cup-shaped member, and having electrical connection with the linin member, a non-conducting member carrie by said conducting lining,

and held thereon by said shell, a conducting thereof, and a volume of mercury carried by member carried by said last mentioned nonthe cup-shaped memberand adaptedtocomconducting member, and extendinginto the plete an electl'lcal clrcult between the hnmg cup-shaped member, and a uid conducting ofb the cup-shaped member and said electrode.

medium carried by said cup shaped 'member and forming an electrical connection between l the lining of the cup-shaped member and said electrode.I

2. A fuse comprising a cup-shaped member of non-conducting material, a tubular member of conducting material forming al lining for the cup-shaped member, a shell of conducting material embracing said cupshaped member, and having electrical connection with the lining member, a non-conf ducting lining held. in position in the cup like member by the shell, a conducting member carried by said last mentioned non-conducting member and extending intothe cupshaped member, and a Huid conducted mef dium carried by said cup-shaped member and forming an electrical connection between the lining of the cup shaped member and said electrode.

3. A fuse comprising a cup-shaped member of non-conducting'material, a lining for In testimony whereof I ailix my sighature.

IRWIN G. ROODER.-

vno

said cup-shapedl member, a shell, said shell adapted to engage said lining to retain the shell in position on the cup-,shaped member, an insulating member carried by said lining, and an electrode carried by said insulating member and projecting into the cup-shaped member in spaced relation with the lining thereof.

4. A fuse comprising a cup-shaped member, a lining therefor, a flange projecting from said lining and extending beyond the outer face of thecup-shaped member, a shell,

said shell having screw threaded engagement with the flange of the lining, an insulating member carried by the lining and held thereon by said shell, an electrode carried by said insulating member and projecting into the cup like member in spaced'relation with `the linin thereof, and mercury,4 carried in the cup-s aped member and adapted to establish an electrical connection between the lining and the electrode.

5. A fuse comprising a cup-shapedlmenbv berfof non-conducting material, a conducting lining for Said cup-shaped member, a flange projecting from said lining, and vextending to a point beyond the. outer face of the cupl shaped member, said flange having a screw thread upon its peripheral edge, a threaded shell member, said shell member adapted to receive the' cup-shaped member and have 'threaded engagement with the Iiange of the lining therefor to retain the shell in position upon the cup-shaped member, a non-conduct- Y ingmember carried by said--lining', land secured in position thereon by said shell, an electrode carried by said non-conducting mal terial and projecting into the cup-shaped member `in spaced relation with the lining 

